A chemical reaction is in equilibrium when
the reactants are completely transformed into products
the rate of forward reaction is equal to the rate of backward reaction
the formation of products is minimised
equal amount of reactants and products are present
For the following gaseous reaction, H2 + I2 2HI, the equilibrium constant
Kp > Kc
Kp< Kc
Kp= Kc
Kp= 1/Kc
According to Le-Chatelier's principle which of the following factors influence a chemical system?
Concentration only
Pressure only
Temperature only
Concentration, pressure and temperature
The pH of water decreases with?
increase in temperature
increase in pressure
decrease in temperature
decrease in pressure
If H+ concentration of fruit juice is 3.3 × 10-2, then its pH will be
4.8 basic
4.8 neutral
4.8 acidic
1.6 acidic
The correct order of the acidity of following acids is-
CH3COOH, HCOOH, Cl-CH2COOH, F-CH2COOH, (Cl2)CHCOOH
Cl2CHCOOH > F-CH2COOH > Cl-CH2COOH > HCOOH > CH3COOH
F-CH2COOH > Cl-CH2COOH > Cl2CHCOOH > HCOOH > CH3COOH
HCOOH > CH3COOH > Cl-CH2COOH > Cl2CHCOOH > F-CH2COOH
None of the above
Solubility product of pure PbCl2 will be
Ksp = S2
Ksp = 4S3
Ksp = 108 S5
Ksp = S
B.
Ksp = 4S3
PbCl2 Pb2+ + 2Cl-
If solubility of PbCl2 is S.
Then, solubility of Pb2+ = S
and solubility of Cl- = 2S
On applying law of mass action,
K =
K[PbCl2] = [Pb2+][Cl-]2
Ksp = S × (2S)2
= 4S3